Another thing that would have been great is if Poland lost to the Soviets rather than beating because next they would have went after Germany who could quickly remobilize and break the back of commie bullshit before it infests the earth.
Germans wanted alliance with soviets,not fight them.They would do that, attack rest of Europe,win thanks to masons and useful idiots in France - and,after victory,soviets would backstab them using german commies.
Commie Europe,Gulags,gulags elsywhere.
Your scenario need normal Germany - which never existed.Becouse it was created by prussian madmans.
P.S FDR really knew nothing about Poland - so,if you move his mind to Wilson in 1918,he would not knew about polish uprisings in Poznań and Silesia,supported politically by France.
So,germans would lost polish territories there just like in OTL.